( Splits word into msb/lsb, lsb being on TOS )
: SPLITB
    256 /MOD SWAP
;
: PC H@ ORG @ - BIN( @ + ;
( A, spits an assembled byte, A,, spits an assembled word
  Both increase PC. To debug, change C, to .X )
: A, C, ; : A,, SPLITB A, A, ;
: <<3 3 LSHIFT ;    : <<4 4 LSHIFT ;
( As a general rule, IX and IY are equivalent to spitting an
  extra 0xdd / 0xfd and then spit the equivalent of HL )
: IX 0xdd A, HL ; : IY 0xfd A, HL ;
: _ix+- 0xff AND 0xdd A, (HL) ;
: _iy+- 0xff AND 0xfd A, (HL) ;
: IX+ _ix+- ; : IX- 0 -^ _ix+- ;
: IY+ _iy+- ; : IY- 0 -^ _iy+- ;